MCQ
Consider the reactions $C(s) + 2{H_2}(g) \to C{H_4}(g),\Delta H = - x\,kcal$
$C(g) + 4H(g) \to C{H_4}(g),\,\Delta H = - {x_1}\,k\,cal$
$C{H_4}(g) \to C{H_3}(g) + H(g),\,\Delta H = + y\,k\,cal$
The bond energy of $C - H$ bond is
- ✓$y\,kcal\,mo{l^{ - 1}}$
- B${x_1}\,kcal\,mo{l^{ - 1}}$
- C$x/4\,kcal\,mo{l^{ - 1}}$
- D${x_1}/4\,kcal\,mo{l^{ - 1}}$
